General Motors Issued Service Update for Cadillac Radiators
The update addresses radiator coolant leaks in 2023-2025 Cadillac XT5 and XT6 models.
Updated on Sept. 20, 2026 in Car Maintenance
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General Motors has released a service update for 2023-2025 Cadillac XT5 and XT6 vehicles to prevent radiator coolant leaks. The issue stems from thermal break tabs on the radiator that create stress on the component.
Why it matters
Removing these specific radiator tabs helps prevent potential coolant leaks that could otherwise lead to cooling system failures. The procedure is a preventative measure for affected vehicles identified in the company's global warranty system.
The repair requires technicians to remove four thermal break tabs from the radiator using side cutters. The entire service operation is estimated to take approximately 0.3 hours per vehicle.
The players
General Motors
General Motors is a multinational automotive manufacturer headquartered in Detroit that designs, builds, and sells vehicles under brands including Cadillac.
Cadillac
Cadillac is a luxury vehicle division of General Motors that produces high-end sedans and SUVs such as the XT5 and XT6.
The details
Technicians must access the radiator by removing the air splash shield and pulling back the upper baffle. Once the four tabs on both sides of the radiator are removed, the source of the structural stress is eliminated, preventing potential leakage.
Timeline
November 2025: The last Cadillac XT6 was produced.
September 30, 2028: The official service bulletin will expire.
2028: Second-generation Cadillac XT5 and XT6 models are scheduled to debut.
Roadmap
This service update arrives as General Motors prepares for a transition in its SUV lineup, with production of current XT6 units having concluded in 2025. The automaker is now pivoting toward the 2028 launch of second-generation models to maintain its position in the luxury market.
Owners of 2023-2025 Cadillac XT5 or XT6 models should contact their local dealer to check if their specific vehicle is included in the service bulletin. The repair is a quick procedure that requires no new parts and aims to prevent future cooling system issues.
The takeaway
Vehicle owners should stay updated on manufacturer service bulletins to address minor mechanical stresses before they result in major leaks. Regularly scheduled dealership visits are the most effective way to ensure your vehicle is updated with the latest service requirements.
Further reading
Learn more about factory-recommended vehicle care by visiting our Car Maintenance section.
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